Mold for water-tanks.



Patented Mar. I3, |900.

D E. FORKER.

AMOLD FOR WATER TANKS.

(Application led July 7, 1899.)

(No Model.)

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Y E Norms PETERS oo., PHTo-LT UNITED STATES PATENT EEicE.

I) EDMUND FORKER, OF BEDFORD, MIOIIIGAN;

IVIOLD FOR WATER-TANKS.

SPECIFICATION forming part of Letters Patent No. 645,254, dated March 13, 19O. Application led July 7, 1899. Serial No. 723,081. (No model.)

To all whom` z3 may concern:

.Be it known that I, D EDMUND FORKER, a citizen of the United States of America, residing at Redford, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Molds for \Vater-Tanks,of which the following is a specifcation, reference being had therein to the accompanying drawings.

My invention relates to new and useful im-v provements in molds for cement water-tanks, and has for its object to produce a mold which is simple in construction, so that it may be readily set up and taken down, and at the same-time facilitates the work of shoveling in the cement and tamping it by having the outer mold built up in sections.

The invention further consists in the sectional construction of the inner mold,whereby it may be readily enlarged or contracted and can be collapsed, so as to remove it from the mold after the work is done without injury to the work, the forni of the tank being such as to permit the ready withdrawal of the mold and prevent all danger of cracking from freezing.

The invention further consists in the peculiar construction, arrangement, and combination of the various parts, all as more fully hereinafter described, and shown in the accompanying drawings, in which- Figure l is a perspective view showing my mold as in use with one of the side boards dropped down. Fig. 2 is a section on line no, Fig. l, looking to the right. F-ig. 3 is a section on line y y, Fig. 1. Fig. 4 is a plan view of the inner mold.

A is the outer mold, built up of two superimposed sections, each composed of sides A' and ends A2, the sides A' of the upper section being preferably hinged to those of the lower section, as shown, and the ends A2 are removably held in vertical guides on the side boards. The sides and ends of each section are held together by removable tie-rods a in the usual manner, thereby permitting of the mold to be readily taken apart or built up one section after another as the work progresses.

D is the inner mold, formed with an open bottom and with sides and ends curving outwardly from the bottom up, the corners being rounded. A novel feature in the con# struction of this inner mold is that either the sides or the ends, or both, are constructed with intermediate removable sections F. In Fig. l the mold is made up with intermediate sectionsvin both the sides and ends, and in Fig. 4c the ends only have such sections. The object of these sections is to render the inner mold collapsible and also to form a means for making the inner mold larger or smaller, so that the size of the tank or the thickness of the walls may be varied. To this end the mold is constructed of the corner-sections E, formed at their ends with vertical abutments 19, and the intermediate sections are formed with'corresponding abutments b', to which are secured two tie-rods c and d, the former removably engaging in open bearings e on the adjacent abutments l) and the latter being secured thereto bystaple-and-pin connections, all in such manner that they form the means for rigidly connecting the sections together, and when the work is done the intermediate section can be removed by first unlocking the tie-rod d and thence swinging the section F inwardly, the tie-rod c forming the pivot. The inner mold can thus be collapsed after ythe work is done by taking out the intermediate sections from two opposite sides of the mold. j

In Fig. 4, where the inner mold is shown without having the intermediate sections in two of its sides, the corner-sections are connected by means of bolts through the abutments h. By having intermediate sections of different sizes the size of the inner mold may be varied.l As to the outer mold, no special provision for changing its size need be made, as this can be readily done on account of its simple construction. Thus it is obvious that by providing end boards of different length the width of this mold may be readily changed, and if the vertical guides for the end boards are made detachable they can be readily adjusted to any desired position.

G are cross-bars having lugs e', adapted to bear against the inside of the inner mold and thereby hold said mold in position by means of tie-bolts f, having their lower ends hooked into the plates g, secured to the lower side boards of the outer mold, as shown in Fig. 3.

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The cross-bars G have two sets of holes for these tie-bolts, so that the latter may be secured in position either by passing them up between the inner and outer mold, as it will have to be 4done when the sides of the upper section are dropped, or by passing them up on the outside.

In constructing a tank with my mold I first put a layer of concrete of the desired thickness in the bottom of the outer mold. Then the inner mold is set upon this bottom and securely held in place by means of the crossbars G, connected to the outer mold by means of the tie-bolts f. The upper side boards A are dropped down before the concrete is put in, so that it may be readily shoveled in and tamped down, and when the concrete wall is built upto the height of the lower section the upper side boards A are raised and the tiebolts f changed from the inside to the outside, after which the mold is filled up, and after it has set the inner mold is removed by rst taking out the intermediate sections.

I may and preferably attach T-shaped projections Z to the inner wall of the upper sides of the outer mold, so as to form recesses in.

the side of the tank adapted to receive the head and shank of a bolt for securing a wooden top upon the cement tank after it is finished and hardened.

What I claim as my invention is- 1. In a mold for tanks, the combination with an outer mold, of a collapsible inner mold composed of side and end walls, inclined outwardly from the bottom up and having an open bottom, said mold having two of its opposite Walls vertically divided into sections and intermediate sections removably secured between said sections.

2. In a mold for tanks, the combination with an outer mold, of an inner mold composed of sides and ends vertically divided into intermediate and end sections and forming an open bottom with the walls inclined outwardly from the bottom up, said mold being collapsible by means of intermediate seetions removably secured between the end sections and having pivotal connections therewith whereby said intermediate sections may be swung inwardly before removing them.

3. In a mold for tanks, the combination of an outer mold composed of superimposed sections, the upper section having side boards hinged to the side boards of the lower section and end boards removably supported in vertical guides on the side boards, tie-rods detachably connecting the ends of the side boards of each section, a collapsible inner mold having an open bottom and outwardlycurved walls from the bottom up, cross-bars extending transversely over the top of the inner and outer mold, and means for securing the ends of said cross-bars to the side boards of the lower section of the outer mold.

4. In a mold for tanks, the combination with an outer mold, of an inner collapsible mold having an open bottom and walls outwardly curved from the bottom up, said ninner mold being formed with sides and ends composed of four corner-sections and intermediate sections formed with vertical abutments at their adjacent ends and means for detachably'connecting each intermediate section between the adjacent corner-sections.

5. In a mold for tanks dre., the combination withan outer mold, of an inner mold composed of side and end walls vertically divided into four corner-sections, said mold being made collapsible by means of intermediate sections removably secured between the corner-sections and having pivoted connections therewith at their upper ends and locking means at their lower ends.

In testimony whereof I affix my signature in presence of two witnesses.

D EDMUND FQRKER.

Witnesses:

OTTO F. BARTHEL, V. D. KINNER. 

